It has been quite some time since this blog was first
posted, so an update is well overdue!
Over the last 18 months, the focus has mainly been on
gathering and completing parts for the many aircraft systems. Even over this relatively short period of
time, original parts have become increasingly harder to locate, and a lot of
effort has gone into fabricating replacement items. This means that although
there has not been a great deal of visible
progress, when the airframe is complete, the systems should be ready to install
also. This should avoid the 80% complete- 80% to go scenario that is so often
mentioned.
An overview of recent progress is as follows.
Work continues of aligning the windscreen assembly, and
new Perspex is being cut and formed.
The flight control systems have received a lot of
attention, with nearly all the required components on hand. Many of the
components had received some form of attention prior to arrival in Scone.
Unfortunately there was little in the way of accompanying paperwork, and to
ensure that all were in good and serviceable condition beneath the layers of
new paint, complete dismantling and detailed inspection was required.
The rudder pedal adjuster assemblies are
complete, except for the installation of the foot pedal castings – one of which
is awaiting approval of a minor repair.
Immediately forward of the cockpit area, all the components for the fire baffle have been completed, and now on hand ready for installation. This will be done in conjunction with the lower fuel tank installation.
The NOS wheel hubs have had new brake drums fitted and line- machined, and complete NOS brake units, including the pneumatic bags, are on hand.
The rudder and elevator are on hand awaiting fabric covering, which will be carried out at a time closer to aircraft completion.
The rudder and elevator lever assembly which is mounted
in the aircraft tail has been completely refurbished, as has the aileron
quadrant in the wings. Both of these assemblies being a mix of new and
refurbished original parts. The elevator lever assembly that sits on fuselage
frame 11 has been refurbished, and the attaching pushrod assembly has been
sourced new. Overhaul has commenced on the control column assembly and
associated aileron cable drum.
The refurbishment of the rudder and elevator trim
components is well underway, with all the components except new chains now on
hand. We were very pleased to finally be able to obtain the elusive ( until now
)original elevator trim hand wheel unit.
Continuing with cockpit related parts – the shut-off and
release mechanism components for the belly tank jettison system are now all on
hand, and refurbishment of them is underway.
All the throttle control system parts are now on hand. Pushrods for the
hand control, and boost control units have been made and assembled locally, and
the throttle cross shaft and mount parts at the fuselage firewall have all been
made, awaiting assembly.
The hand control unit for the carburettor air filter
shutter has been made, including the special Morse lever housing. The mechanism
for operating the shutter, which is mounted on the air intake duct, has also
been made.
Aft of the cockpit resides the pneumatic system components.
Several sets of air bottles have been sourced, and the special top and bottom
fittings ( the lower items also double as the lower mount points for the
bottles ) have been made locally. The upper mount brackets, pneumatic panel
assembly and all the associated pneumatic components are now on hand.
All the components required for the installation of a
static oxygen system are now on hand, and work continues on the various
mounting brackets required.Immediately forward of the cockpit area, all the components for the fire baffle have been completed, and now on hand ready for installation. This will be done in conjunction with the lower fuel tank installation.
The lower fuel tank has now been structurally completed
by Pioneer Aero, and all the various attaching plumbing fittings, elbows etc
have been made locally. The upper tank
was received with the original project kit in a half complete state, This has
now had the missing sheet metal parts and machined fittings made, including a
new dipstick assembly as well as all the special plumbing connections.
Also, the parts required for the installation
of a float valve for the wing fuel tanks transfer system have been made.
Regarding the landing gear system. New retraction ram assemblies are now on
hand, and all the components for the CO2 emergency blow down system have been
sourced. However, the search for parts to complete the undercarriage selector
in the cockpit continues.
The NOS wheel hubs have had new brake drums fitted and line- machined, and complete NOS brake units, including the pneumatic bags, are on hand.
The rudder and elevator are on hand awaiting fabric covering, which will be carried out at a time closer to aircraft completion.
Moving to the “business end’ of the aircraft. The overhaul
of the Merlin 70 engine is continuing in conjunction with another engine
rebuild. The sourcing of the required replacement parts, and overhaul of others
is ongoing. We have so far collected 10 of the required 12 exhaust stacks – the
remaining 2 items continue to be elusive !
The propeller components are currently in England being
inspected for suitability for overhaul. A set of 4 new Hoffmann propeller
blades is also on hand.
A complete original spinner assembly is waiting its turn
for refurbishment. A new nose cone is on hand to be fitted.
The radiators for the engine coolant and oil cooling
systems are currently being manufactured, with completion imminent. A full set
of new copper pipes and most of the required seal and coupling parts are on
hand.
A complete original large capacity oil tank is also on
hand waiting to be rebuilt.
Showing more in the way of visual progress are the wings.
A lot of effort has gone into the alignment and correct positioning of the wing
flaps, and trailing edge area. At first glance, this area appears quite simple
and straight forward, but everything had to be in an exact position for
everything to work correctly and faultlessly. The wing skins, with their many
joggled portions and rebates, are well underway, and work has also commenced on
the assembly of the various access doors for the armament and flight control
systems. The parts for all doors are on hand, including locally made catches
and receptacles.
Work has also been carried out on reproducing the
armament mounting parts, to allow the installation of replica guns if
desired. To enable this to happen, some
of the wing ribs have required additional structural parts to be made.
Also, minor changes to the wing structure are being
incorporated to accommodate the wing fuel tanks in the cannon and ammunition
bays, in accordance with the Spitfire TR9 variant .
The wing tip assemblies are on hand, and these will be
able to be fitted when the wings can be removed from their assembly fixtures in
a few months time.
Finally, approximately half of the parts required for the
wing to fuselage fairings are now on hand, with the remaining parts well
underway.
More to follow shortly....